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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 4 |
| 6 | 4 |
| 7 | 1 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 17 |
| 12 | 67 |
| 13 | 104 |
| 14 | 81 |
| 15 | 36 |
| 16 | 9 |
| 17 | 1 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 68 |
| 23 | 632 |
| 24 | 2594 |
| 25 | 6168 |
| 26 | 9454 |
| 27 | 9988 |
| 28 | 7618 |
| 29 | 4308 |
| 30 | 1816 |
| 31 | 560 |
| 32 | 120 |
| 33 | 16 |
| 34 | 1 |
| 35 | 0 |
| 36 | 0 |
| 37 | 0 |
| 38 | 0 |
| 39 | 0 |
| 40 | 259 |
| 41 | 4351 |
| 42 | 34162 |
| 43 | 165932 |
| 44 | 556667 |
| 45 | 1365401 |
| 46 | 2539513 |
| 47 | 3682167 |
| 48 | 4258223 |
| 49 | 4001349 |
| 50 | 3098369 |
| 51 | 1994804 |
| 52 | 1071617 |
| 53 | 479282 |
| 54 | 176976 |
| 55 | 53125 |
| 56 | 12650 |
| 57 | 2300 |
| 58 | 300 |
| 59 | 25 |
| 60 | 1 |
[0,1,0,0,4,4,1,0,0,0,17,67,104,81,36,9,1,0,0,0,0, 68,632,2594,6168,9454,9988,7618,4308,1816,560,120, 16,1,0,0,0,0,0,259,4351,34162,165932,556667, 1365401,2539513,3682167,4258223,4001349,3098369, 1994804,1071617,479282,176976,53125,12650,2300, 300,25,1] |